Doha International Airport — Doha, Qatar

Before Qatar built the gleaming Hamad International Airport that now dominates its aviation ambitions, DIA carried the load as the country's sole major air gateway for decades, watching Qatar Airways grow from a small regional carrier into a globally recognized brand during that period. Located directly along Doha's waterfront, the older airport's runway placement eventually became a serious constraint as both the airline and passenger volumes expanded well beyond what the facility could comfortably support. Commercial passenger operations largely shifted to the new airport when it opened in 2014, though DIA has continued hosting military aviation, general aviation traffic, VIP flights, and certain cargo operations since. Its central, coastal position within the city made surrounding land valuable for later urban development as Doha's skyline kept expanding rapidly.